Yes, natural language is a fifth generation programming language.

The only decent attempt at a 5th generation programming language was done by japan in the 90's and it was based on prolog. It was deemed too slow and inefficient to be of viable use, and as such there has been no marketable 5gl to date, so the question would have been better posed as 'Is there a fifth generation programming language?' - also note that the idea of 5gl is just that, an idea. Even if we succeed in creating a 5gl, it will be 'A' 5gl language, not 'THE' 5gl language

No. It would be a third generation programming language.

The major advantages of fifth generation programming languages are that these languages are improved from fourth generation languages.

It is also important to note that classification of programming languages in generations beyond the second generation is complete nonsense and nothing but a marketing hype; programming languages don't evolve in a linear succession, or one in the shape of a balanced tree, where each generation has common attributes and improvements over the previous generation.

Easier to learn: Second-generation programming languages are easier to learn than first-generation languages. They are closer to human language and are more intuitive